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Avoiding loops by preventing further fast reroute (FRR) after an earlier frr

Active Publication Date: 2021-07-01
JUMIPER NETWORKS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a mechanism for preventing further FRR (Fast Reroute) in cases where it may be harmful. A special-purpose label or an extended special-purpose label can be used to indicate that a backup detour is being made and can be forwarded using a forwarding label associated with the backup next ho. This mechanism helps avoid loops in a network and ensures that data packets are forwarded to their destination efficiently.

Problems solved by technology

That is, in some cases, once Fast Reroute (FRR) has occurred (e.g., for MPLS protection), a further FRR is undesirable, and even detrimental.

Method used

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  • Avoiding loops by preventing further fast reroute (FRR) after an earlier frr
  • Avoiding loops by preventing further fast reroute (FRR) after an earlier frr
  • Avoiding loops by preventing further fast reroute (FRR) after an earlier frr

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Embodiment Construction

[0060]The present disclosure may involve novel methods, apparatus, message formats, and / or data structures for avoiding loops in communications networks, such as communications networks that employ FRR. The following description is presented to enable one skilled in the art to make and use the described embodiments, and is provided in the context of particular applications and their requirements. Thus, the following description of example embodiments provides illustration and description, but is not intended to be exhaustive or to limit the present disclosure to the precise form disclosed. Various modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles set forth below may be applied to other embodiments and applications. For example, although a series of acts may be described with reference to a flow diagram, the order of acts may differ in other implementations when the performance of one act is not dependent on the comple...

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Abstract

In some cases, once Fast Reroute (FRR) has taken place (e.g., for MPLS protection), a further FRR is undesirable, and even detrimental. A mechanism to prevent a further FRR, once such a further FRR is determined to be potentially harmful, is described.

Description

§ 0. RELATED APPLICATION(S)[0001]This application claims the benefit of U.S. Provisional Application No. 62 / 956,101 (referred to as “the '101 provisional” and incorporated herein by reference), titled “AVOIDING LOOPS BY PREVENTING FURTHER FAST REROUTE (FRR) AFTER AN EARLIER FRR,” filed on Dec. 31, 2019 and listing Kireeti Kompella, Wen Lin and Kevin F. Wang and as the inventors. The scope of the invention is not limited to any requirements of the specific embodiments in the '101 provisional.§ 1. BACKGROUND OF THE INVENTION§ 1.1 Field of the Invention[0002]The present description concerns communications networks. More specifically, the present description concerns communications networks that employ fast reroute (FRR) and its potential to cause the problem of looping.§ 1.2. Background Information[0003]§ 1.2.1 Multiprotocol Label Switching (Mpls)[0004]Multiprotocol Label Switching (MPLS) is a method for engineering traffic patterns by assigning short labels to network packets that des...

Claims

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Application Information

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IPC IPC(8): H04L12/723H04L12/707H04L12/46H04L12/733H04L12/705H04L29/06H04L45/18H04L45/28H04L45/122H04L45/24H04L45/50
CPCH04L45/507H04L45/22H04L69/22H04L45/20H04L45/18H04L12/4633H04L45/50H04L45/28H04L45/26
Inventor KOMPELLA, KIREETILIN, WENWANG, KEVIN
Owner JUMIPER NETWORKS INC
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